/*
   * Copyright (C) 2000 Jens Axboe <axboe@suse.de>
   * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>
   *
   * May be copied or modified under the terms of the GNU General Public
   * License.  See linux/COPYING for more information.
   *
   * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and
   * DVD-RW devices.
   *
   */
  #ifndef _UAPI__PKTCDVD_H
  #define _UAPI__PKTCDVD_H
  
  #include <linux/types.h>
  
  /*
   * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
   */
  #define PACKET_DEBUG		1
  
  #define	MAX_WRITERS		8
  
  #define PKT_RB_POOL_SIZE	512
  
  /*
   * How long we should hold a non-full packet before starting data gathering.
   */
  #define PACKET_WAIT_TIME	(HZ * 5 / 1000)
  
  /*
   * use drive write caching -- we need deferred error handling to be
   * able to successfully recover with this option (drive will return good
   * status as soon as the cdb is validated).
   */
  #if defined(CONFIG_CDROM_PKTCDVD_WCACHE)
  #define USE_WCACHING		1
  #else
  #define USE_WCACHING		0
  #endif
  
  /*
   * No user-servicable parts beyond this point ->
   */
  
  /*
   * device types
   */
  #define PACKET_CDR		1
  #define	PACKET_CDRW		2
  #define PACKET_DVDR		3
  #define PACKET_DVDRW		4
  
  /*
   * flags
   */
  #define PACKET_WRITABLE		1	/* pd is writable */
  #define PACKET_NWA_VALID	2	/* next writable address valid */
  #define PACKET_LRA_VALID	3	/* last recorded address valid */
  #define PACKET_MERGE_SEGS	4	/* perform segment merging to keep */
  					/* underlying cdrom device happy */
  
  /*
   * Disc status -- from READ_DISC_INFO
   */
  #define PACKET_DISC_EMPTY	0
  #define PACKET_DISC_INCOMPLETE	1
  #define PACKET_DISC_COMPLETE	2
  #define PACKET_DISC_OTHER	3
  
  /*
   * write type, and corresponding data block type
   */
  #define PACKET_MODE1		1
  #define PACKET_MODE2		2
  #define PACKET_BLOCK_MODE1	8
  #define PACKET_BLOCK_MODE2	10
  
  /*
   * Last session/border status
   */
  #define PACKET_SESSION_EMPTY		0
  #define PACKET_SESSION_INCOMPLETE	1
  #define PACKET_SESSION_RESERVED		2
  #define PACKET_SESSION_COMPLETE		3
  
  #define PACKET_MCN			"4a656e734178626f65323030300000"
  
  #undef PACKET_USE_LS
  
  #define PKT_CTRL_CMD_SETUP	0
  #define PKT_CTRL_CMD_TEARDOWN	1
  #define PKT_CTRL_CMD_STATUS	2
  
  struct pkt_ctrl_command {
  	__u32 command;				/* in: Setup, teardown, status */
  	__u32 dev_index;			/* in/out: Device index */
  	__u32 dev;				/* in/out: Device nr for cdrw device */
  	__u32 pkt_dev;				/* in/out: Device nr for packet device */
  	__u32 num_devices;			/* out: Largest device index + 1 */
  	__u32 padding;				/* Not used */
  };
  
  /*
   * packet ioctls
   */
  #define PACKET_IOCTL_MAGIC	('X')
  #define PACKET_CTRL_CMD		_IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
  
  
  #endif /* _UAPI__PKTCDVD_H */